An eccentric assembly for use in a gyratory or cone crusher is provided. The gyratory or cone crusher includes a main shaft having a longitudinal extension along a central axis of the crusher, a head assembly including a crushing head provided with a first crushing shell, and a frame provided with a second crushing shell, wherein the first and second crushing shells between them define a crushing gap. The eccentric assembly is provided with an inner circumferential surface and an outer circumferential surface eccentrically arranged relative to the inner circumferential surface, wherein the inner circumferential surface of the eccentric assembly is arranged for being journalled to the main shaft so that the eccentric assembly is adapted to rotate about said central axis, and wherein the outer circumferential surface of the eccentric assembly is arranged for being journalled to the crushing head. The eccentric assembly includes a first eccentric part and a second eccentric part which is configured for being located at a distance from the first eccentric part in a direction along the central axis.

A novel gear well (200) for a crusher (1) may be characterized in that the recess (210) comprises a helical, non-uniform depth recess having a high point (212A) and a low point (212B). The gear well (200) may be further characterized in that rather than extending to a sharp corner transition (112) and then to an orthogonal sidewall (126), the floor (211) of the recess (210) may instead intersect or blend with the pinion clearance floor (222) adjacent the low point (212B). The helical, non-uniform depth recess (210) is preferably configured for improving the strength of a gear well (200) and/or configured for mitigating oil frothing within the gear well (200), without limitation.

A novel gear well (200) for a crusher (1) may be characterized in that the recess (210) comprises a helical, non-uniform depth recess having a high point (212A) and a low point (212B). The gear well (200) may be further characterized in that rather than extending to a sharp corner transition (112) and then to an orthogonal sidewall (126), the floor (211) of the recess (210) may instead intersect or blend with the pinion clearance floor (222) adjacent the low point (212B). The helical, non-uniform depth recess (210) is preferably configured for improving the strength of a gear well (200) and/or configured for mitigating oil frothing within the gear well (200), without limitation.

A mantle is provided that is disposed over a cone head of a cone crusher, including an outer surface designed to cooperate with a crusher liner to crush rocks that enter a crushing zone between the outer surface of the mantle and the crusher liner. Also provided is a mantle nut and washer assembly for mounting the mantle to the cone head. The mantle includes a flange extending around an inner surface of the mantle between the inner surface of the mantle and the mantle nut and washer assembly to absorb heat generated when performing cutting operations to remove and replace the mantle.

A system for maintaining a downward force on a central shaft of a cone crusher having a stationary frame, including a disc fixedly mounted to the frame, the disc having a centrally-disposed aperture with a first diameter. A plate is mounted to an end cap, the plate having a second diameter that is greater than the first diameter. The plate is disposed distally of the disc and the end cap is disposed proximally of the disc. A housing is fixed to the central shaft and biased away from the end cap wherein a downward bias is imparted to the central shaft.

A system for maintaining a downward force on a central shaft of a cone crusher having a stationary frame, including a disc fixedly mounted to the frame, the disc having a centrally-disposed aperture with a first diameter. A plate is mounted to an end cap, the plate having a second diameter that is greater than the first diameter. The plate is disposed distally of the disc and the end cap is disposed proximally of the disc. A housing is fixed to the central shaft and biased away from the end cap wherein a downward bias is imparted to the central shaft.

A system for maintaining a downward force on a central shaft of a cone crusher having a stationary frame is provided, wherein the central shaft is mounted to rotate with respect to the stationary frame. The system may include a disc fixed to the frame and having a substantially centrally-disposed opening. A pressure plate may be mounted to and biased toward the central shaft and positioned below the disc. The pressure plate may have a surface that faces the disc and extends downwardly. The bias of the pressure plate toward the central shaft may bias the pressure plate against the disc during at least some crushing operations. The disc may exert a downward force on the pressure plate and on the central shaft to which the pressure plate is mounted during the at least some operations.

A system for maintaining a downward force on a central shaft of a cone crusher having a stationary frame is provided, wherein the central shaft is mounted to rotate with respect to the stationary frame. The system may include a disc fixed to the frame and having a substantially centrally-disposed opening. A pressure plate may be mounted to and biased toward the central shaft and positioned below the disc. The pressure plate may have a surface that faces the disc and extends downwardly. The bias of the pressure plate toward the central shaft may bias the pressure plate against the disc during at least some crushing operations. The disc may exert a downward force on the pressure plate and on the central shaft to which the pressure plate is mounted during the at least some operations.

A gyratory crusher spider arm shield for releasable mounting to a spider arm is mounted in a position above and around the spider arm via locating feet and is maintained in the position by a fixating ring extending circumferentially around the spider arms and positioned at and above a perimeter of the spider.

Embodiments disclosed herein provide a cone crusher having a bowl support and a stationary frame to which the bowl support may be mounted, the frame including an outwardly-facing threaded portion. A wedge structure may be disposed between the bowl support and the threaded portion of the frame, the wedge structure including an inwardly-facing threaded portion, the threads of which complement the outwardly facing threaded portion of the frame. Means may be provided for exerting an upward force on the wedge structure to move the wedge structure from an original position to an operational position during crushing operations and means may be provided for exerting a downward force on the wedge structure to return the wedge ring to the original position following crushing operations.